METHOD OF PRODUCING REFRACTORY MATERIALS Russian patent published in 2017 - IPC B22F3/23 C22C29/00 C04B35/58 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to production of refractory materials. Method involves preparation of exothermic mixture of powders and mixture of powders of chemical furnace, formation of layered batch, initiation of combustion reaction therein in form of self-propagating high-temperature synthesis (SHS) with pressing of obtained SHS product. Mixture of powders of chemical furnace is made of stoichiometric mixture of powders of titanium and carbon black. Formation of layered batch is performed by placing exothermic mixture of powders inside mixture of powders of chemical furnace at ratio of thicknesses of exothermic mixture of powders and mixture of powders of chemical furnace equal to 1:0.5–1:4. Exothermal mixture of powders is separated from mixture of powders of chemical furnace 0.1–1.0 mm thick graphite layer. Initiation of combustion reaction in form of SHS is performed simultaneously in mixture of powders of chemical furnace and exothermic mixture of powders at pressure of 5–20 MPa and 1–20 s after initiation obtained SHS product is pressed under pressure of 100–450 MPA during 1–30 c, then it is cooled and obtained refractory material is separated from combustion products of mixture of powders of chemical furnace.

EFFECT: decreased residual porosity and high hardness of material are achieved.

1 cl, 1 dwg, 1 tbl, 2 ex